From my records, the correct part number (in my case) was an MJ11028G from ON semiconductor. I would not be surprised if there were alternate part numbers used in these modules, but this is what was factory installed in mine. You can source this part from a lot of places:https://www.digikey.com/products/en?keywords=MJ11028G
They are around $15.
The process is not too bad if you know how to solder/desolder. The important highlights:
1. You will have to make provisions for holding down the heatsink after you remove it. I don't remember how it was from the factory, but I used two 4-40 screws and I seem to remember using little nylon sleeves to INSULATE the studs from the heatsink.
2. Use thermal compound or heatsink tape between the heatsink and the transistor CAN.
3. After the repair, I sprayed the solder side with conformal coating to protect the joints. Insulating varnish, or even spray paint would likely do the job just as well. May not even have to do it at all.
I make the process sound daunting. It did not take long. I modded mine after hearing horror stories about even the replacement blower modules frying immediately, or soon after replacement. So even if the cost was the same, it was worth it. Not to mention, when it blew a second time, the install and removal of the module was way more time than the transistor swap.
Feel free to PM me, or, if there is interest, I can give a better writeup on the forum.